Vapour rises from cooling towers at the Loy Yang coal fired power station, about 150 km (93 miles) east of Melbourne in Victoria state April 2, 2012. After years of wrenching debate, a carbon tax on Australian industry starts in July, but instead of bringing much-needed investment certainty, the scheme is delivering the opposite. Picture taken April 2, 2012. REUTERS/Sonali Paul (AUSTRALIA - Tags: ENVIRONMENT ENERGY POLITICS BUSINESS)